Hello Doctor, I am writing you from Vienna. I was by my gynekologie today, who sayd my embrio growing very slowly. I am 8 week 3 days pregnant, but on the scan show that I am just six weeks 3 days. My question is: if my last period was on the 12th of December 2012, and I know definitely, that I was together with my husband on the 28th of December it should be ok. What do you think? The embrio is 5, 4 mm.